How to control the wrinkling of metal stamping parts?

Many friends who are engaged in metal stamping work know that if the metal stamping parts are not operated carefully, it will cause the metal stamping parts to wrinkle, thereby affecting the appearance of the metal stamping parts, which not only increases the production cost, but also wastes a lot of manpower and financial resources. In order to reduce production costs, the following author will tell you how to control the wrinkling of metal stamping parts. We have to 'prescribe the right medicine' to achieve the results we want, so we must first understand the causes of wrinkles in metal stamping parts. Reasons for wrinkling of metal stamping parts: 1. The positioning of the blank is unstable, which leads to partial pressure in the material, improper shape of the pressing surface, resulting in uneven feeding. 2. Insufficient blank holder force and improper blanking surface clearance will cause the problem of 'loose inside and tight outside'. 3. The test blank is too soft, the material strength is low, and the blank size is too small to hold the material. 4. Too much lubricating oil or brushing too frequently, or the brushing position is improper. 5. Improper direction of stamping parts. Methods to control wrinkling of metal stamping parts: 1. For the unstable positioning of the blank, we can improve the positioning and add pre-bending process if necessary to ensure that the blank will not run off when the part is stamped. At the same time, the shape of the blanking surface can be modified to ensure the quality of the metal stamping parts and avoid the shape of the blanking surface from moving, resulting in uneven feeding. 2. Check the state of wrinkles. If wrinkles are evenly generated around the workpiece, it should be judged that the pressing force is insufficient, and gradually increasing the pressing force can be eliminated. If the tapered parts and hemispherical parts are drawn, deepening ribs can be added to increase the tensile stress within the inner diameter of the plate to eliminate wrinkles. Adopt the principle of 'tight inside and loose outside' to eliminate the problem of 'tight inside and loose outside'. 3. Under the condition of not affecting the requirements of the whole vehicle, replace the parts with too soft blanks to ensure the quality of the parts and avoid wrinkles. 4. For lubricating oil, the oil should be brushed in accordance with the requirements of the operating rules and regulations to ensure that the amount and position of the brush are correct, and the number of brushing times is correct to avoid wrinkling. 5. For improper stamping direction, simulation software should be used to analyze the part process at the initial stage of design to ensure the stamping direction of the part. When the quality of the part is high, it is necessary to re-develop the mold and adjust the stamping direction. The above is about how to control the wrinkling of metal stamping parts. I hope that after reading the article, you can reduce the problem of metal stamping wrinkles, thereby reducing production costs.